This study evaluated the effect of surface sealant on the translucency of composite resin immersed in different solutions. The study involved the following materials: Charisma, Fortify and coffee, Coca-Cola ® , tea and artificial saliva as solutions. Sixty-four specimens (n = 8) were manufactured and immersed in artificial saliva at 37 ± 1 °C. Samples were immersed in the solutions for three times a day and re-immersed in artificial saliva until the translucency readings. The measurements were carried out at nine times: T1 -24 hours after specimen preparation, T2 -24 hours after immersion in the solutions, T3 -48 hours and T4 to T9 -7, 14, 21, 30, 60 and 90 days, respectively, after immersion. The translucency values were measured using a JOUAN device. The results were subjected to ANOVA and Tukey's test at 5%. The surface sealant was not able to protect the composite resin against staining, the coffee showed the strongest staining action, followed by tea and regarding immersion time, a significant alteration was noted in the translucency of composite resin after 21 days.

Introdução: O líquen plano é uma desordem mucocutâneaimunologicamente mediada que afeta pele e/ou mucosa. Em geral, os estudosrevelam que a prevalência varia de 0,02 a 1,2% da população. Relato docaso e conclusão: Um caso clínico de líquen plano bucal diagnosticado etratado na Clínica Odontológica da Faculdade São Lucas será apresentado,assim como os resultados obtidos após tratamento com corticóide tópico.